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| Lopes,Elessandra Laura Nogueira; Fernandes,Antonio Rodrigues; Lourdes Pinheiro Ruivo,Maria de; Cattanio,José Henrique; Souza,Gladys Ferreira de. |
| The increase in agricultural production in the Brazilian Amazon region is mostly a result of the agricultural frontier expansion, into areas previously influenced by humans or of native vegetation. At the same time, burning is still used to clear areas in small-scale agricultural systems, leading to a loss of the soil productive capacity shortly after, forcing the opening of new areas. This study had the objective of evaluating the effect of soil preparation methods that involve plant residue shredding, left on the surface or incorporated to the soil, with or without chemical fertilization, on the soil chemical and biological properties. The experiment was conducted in 1995, in an experimental field of Yellow Latosol (Oxisol) of the Embrapa Amazônia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Secondary vegetation; Burning; Biomass shredding; Cultivation cycles. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400006 |
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| Cattanio,José Henrique; Kuehne,Ronald; Vlek,Paul L.G.. |
| The new techniques proposed for agriculture in the Amazon region include rotational fallow systems enriched with leguminous trees and the replacement of biomass burning by mulching. Decomposition and nutrient release from mulch were studied using fine-mesh litterbags with five different leguminous species and the natural fallow vegetation as control. Samples from each treatment were analyzed for total C, N, P, K, Ca, Mg, lignin, cellulose content and soluble polyphenol at different sampling times over the course of one year. The decomposition rate constant varied with species and time. Weight loss from the decomposed litter bag material after 96 days was 30.1 % for Acacia angustissima, 32.7 % for Sclerolobium paniculatum, 33.9 % for Iinga edulis and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contrasting chemical compositions; Nutrient mineralization; Nutrient immobilization; Litterbags. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000300016 |
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